open-webui Open WebUI up to 0.8.x HTTP Request oauth.py _process_picture_url server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in open-webui Open WebUI up to 0.8.x. This issue affects the function _process_picture_url of the file backend/open_webui/utils/oauth.py of the component HTTP Request Handler. Such manipulation leads to server-side request forgery. This vulnerability is referenced as CVE-2026-45338. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in open-webui Open WebUI up to 0.8.x and classified as critical. Affected by this issue is the function _process_picture_url of the file backend/open_webui/utils/oauth.py of the component HTTP Request Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a Server-Side Request Forgery (SSRF) vulnerability exists in _process_picture_url() in backend/open_webui/utils/oauth.py (line ~1338). The function fetches arbitrary URLs from OAuth picture claims without applying validate_url(), allowing an attacker to force the server to make HTTP requests to internal resources and exfiltrate the full response. This vulnerability is fixed in 0.9.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-45338 since 05/11/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 0.9.0 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Open WebUI 0.9.0

Timelineinfo

05/11/2026 CVE reserved
05/16/2026 +5 days Advisory disclosed
05/16/2026 +0 days VulDB entry created
05/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-24c9-2m8q-qhmh
Status: Confirmed

CVE: CVE-2026-45338 (🔒)
GCVE (CVE): GCVE-0-2026-45338
GCVE (VulDB): GCVE-100-364280

Entryinfo

Created: 05/16/2026 06:46
Changes: 05/16/2026 06:46 (67)
Complete: 🔍
Cache ID: 216::103

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